FMF Gold Series Fatty Pipe 025197 — KTM 65 SX / Husqvarna TC65 / Gas Gas MC 65 2016-2023

Product Description

The FMF Gold Series Fatty Pipe is the most widely used expansion chamber in the motocross world, and for good reason. Designed to provide a broader, smoother powerband, this pipe is the gold standard for riders looking to maximize the performance of their KTM 65 SX, Husqvarna TC65, or Gas Gas MC 65.

Each pipe is computer-designed and dyno-tested to ensure power gains exactly where your machine needs them most. FMF utilizes their proprietary Tru-Flo stamping process, which results in a perfect fit and consistent performance across every unit. Built from strong 19-gauge steel and finished with a durable nickel plating, the Fatty Pipe is engineered to withstand the toughest track conditions while delivering the professional-grade power your racing setup deserves.

Top Features: FMF Gold Series Fatty Pipe

• Computer-designed and dyno-tested for optimized power gains
• Tru-Flo stamping process ensures a precise fit and reliable performance
• Constructed from heavy-duty 19-gauge steel for long-term durability
• Nickel-plated finish provides excellent corrosion and wear resistance

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Will this pipe work with my stock silencer?
A: Yes, the FMF Fatty Pipe is designed to work with either the stock silencer or an FMF aftermarket silencer. However, pairing it with an FMF Powercore 2 or Shorty silencer will give you the most significant performance and sound benefits.

Q: Does it come with new O-rings?
A: Most FMF pipes do not include O-rings. We highly recommend using new exhaust O-rings during installation to ensure a perfect, leak-free seal between the pipe and the cylinder.

Expert Pro-Tip: Never mount a new expansion chamber with old, hard, or flattened O-rings. An exhaust leak at the cylinder junction causes a lean condition that can kill your engine's performance—or worse, cause a top-end failure. Always start fresh with new high-temp O-rings to ensure you get all the horsepower FMF intended.

Recommended Pairings:
o KTM 65 SX Performance Parts & Upgrades
o Husqvarna TC65 Performance Parts
o Gas Gas MC 65 Performance Parts

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

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